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    What alternator do I have?

    Hello all and thanks for the help. My 1987 Mercruiser 5.7 is not charging the battery. After doing a couple tests I have determined that the alternator is bad. Unfortunately I can not find the right alternator for the thing. The alternator that I took off has 3 wires- black (ground), purple...
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    90hp v4 charging problem?

    Hello all, I have done a lot of searching through old posts but I haven't found exactly what I need so thanks in advance for the help. 1991 johnson 90 v4... My fairly new battery died out on the water. I had charged it the day before so it should have been fully charged. I have a shop manual...
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